Improvement in steam-generators



UNITED STATES PATENT OFFICE.

MELLEN BATTEL, OF ALBANY, NEV YORK.

IMPROVEMENT IN STEAM-GNERATORS.

Specification forming part of Letters Patent No. 25,085, dated August16, 1859.

T0 all whom it may concern:

Be it known that 11, MELLEN BATTEL, of the city and county of Albany,and State of New York, have invented a new and useful ImproVement inSteam Boilers; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawings, forming part of this specification, in which-Figure 1 is a Vertical section of aboiler with my improvements applied.Fig. 2 is a horizontal section of the same, taken a short distance abovethe fire-box.

Similar letters of reference indicate corresponding parts in the twofigures.

My invention consists in the employment in the furnace or fiue of aboiler of Vertical water-tubes with closed bottoms suspended from thecroWn-sheet or top plate and extending downward to near the fire orbottom of the furnace or flue and upward through the crown-sheet or topplate above the surface of the water, and combined With inner tubeswhich extend to near the bottoms of those first mentioned and which formcommunication through the sides of the said tubes between the body ofwater above thecrown- Sheet or top of the furnace or flue and the lowerparts of the first-ment-ioned tubes, such combination of tubes providingfor the free upward circulation of steam through the outer tubes and thedownward circulation of water through the inner ones to supply itsplace.

To enable others skilled in the art to make and use my inVention, I willproceed to describe its construction and operation.

A is the outer shell of the boiler.

B is the furnace or fire-box surrounded by water on all sides and havingthe crown-sheet a a Well coVered with water.

E is the exit-fine, and F the smoke-pipe or chimney.

O O are the larger tubes with closed bottoms suspended from thecrown-sheet a a and passing up through it and through the water aboveinto the steam-space.

D D are the smaller tubes with open bottoms placed within the largerones C C and extending from near the bot-tom thereof to a short distanceabove the crown-sheet where by means of an elbow or T-piece b each isconnected with its larger containing one and made to communicate withthe water to pro- Vide for a downward circulation through it to keep upa constant supply of water to the bottom of the larger one to take theplace of what is converted into steam by the intense heat to which thelarger one is exposed. By this combination of tubes a Very rapidgeneration of steam is provided for, for the steam as fast as it isgenerated in the outer tube passes upward to the upward part of theboiler without passing through the descending water which forms a columnin the smaller tube, thus producing so rapid a circulation that nosediment or crust can accumulate in the boiler, the matter which inother boilers would be deposited being carried off with the steam.

To prevent any water or spray that may be carried up by the ascendingcurrents of steam through the tubes O O passing to the steamengine, Iprovide a drum or superheating-Vessel G, surroundin g the smoke-pipe,With pipes d d crossing the smoke-pipe to form communication betweenopposite portions of 'the said drum, and to compel the steam to passthrough these cross-pipes I provide Vertical partitions e e (see Fig. 2)to prevent it circulating all round the said drum. By this means all thewater taken up in Suspension is exposed to the heat of the smoke-pipeand converted into steam.

To provide for the circulation of the flame and gaseous products ofcombustion in contact with the whole of the surfaces of those parts ofthe tubes C O which are below the croWn-sheet, I employ a horizontalpartition H, ascending from the front of the fire-box to near the rearthereof, said partitions being made in Sections, one of said Sectionsbetween every two contiguous rows of tubes C O, and said sections beingarranged to re- Volve on journals for the purpose of dumping into thebottom of the fire-box any soot or dust that may accumulate upon thesaid partition.

What I claim as my invention, and desire to secure by Letters Patent.is-

The combination, with the tubes O O, extending downward through thetube-Sheet or crown of thefire-box or downward into a flue and upwardthrough the water above the tube-Sheet, of the inner tubes D D, appliedin the manner herein described, for the purpose set forth.

MELLEN BATTEL.

Vitnesses:

JOHN CosTIGAN, JOHN J. BURTON.

